CN101615470B - High-performance permanent magnet ferrite arch magnet and sintering method thereof - Google Patents
High-performance permanent magnet ferrite arch magnet and sintering method thereof Download PDFInfo
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- CN101615470B CN101615470B CN2009100986039A CN200910098603A CN101615470B CN 101615470 B CN101615470 B CN 101615470B CN 2009100986039 A CN2009100986039 A CN 2009100986039A CN 200910098603 A CN200910098603 A CN 200910098603A CN 101615470 B CN101615470 B CN 101615470B
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- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 22
- 238000005245 sintering Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000000498 ball milling Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000000227 grinding Methods 0.000 claims abstract description 5
- 239000003245 coal Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 238000000465 moulding Methods 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000002156 mixing Methods 0.000 abstract description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 238000013329 compounding Methods 0.000 abstract 2
- UPWOEMHINGJHOB-UHFFFAOYSA-N oxo(oxocobaltiooxy)cobalt Chemical compound O=[Co]O[Co]=O UPWOEMHINGJHOB-UHFFFAOYSA-N 0.000 abstract 2
- 239000011805 ball Substances 0.000 abstract 1
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract 1
- 235000010216 calcium carbonate Nutrition 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 230000005611 electricity Effects 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 abstract 1
- KTUFCUMIWABKDW-UHFFFAOYSA-N oxo(oxolanthaniooxy)lanthanum Chemical compound O=[La]O[La]=O KTUFCUMIWABKDW-UHFFFAOYSA-N 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910000018 strontium carbonate Inorganic materials 0.000 abstract 1
- LEDMRZGFZIAGGB-UHFFFAOYSA-L strontium carbonate Chemical compound [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 15
- 150000002500 ions Chemical class 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 238000006062 fragmentation reaction Methods 0.000 description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000013467 fragmentation Methods 0.000 description 4
- 239000005338 frosted glass Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000006104 solid solution Substances 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 239000010955 niobium Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000003746 solid phase reaction Methods 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The invention relates to a high-performance permanent magnet ferrite arch magnet mainly comprising a magnet. The shape of the magnet is an arch structure, wherein the inner arc central angle is 158 degrees. The sintering method comprises the following steps: (1) material compounding: compounding raw materials according to the following parts by weight: 85 parts of Fe2O3, 15 parts of SrCO3, 0.5-1.5 parts of La2O3, 0.5-1.5 parts of Co2O3, 0.5-1.0 part of SiO2 and 0.5-1.0 part of CaCO3; (2) mixing; (3) presintering: presintering in a coal mine at the temperature of 1200-1240 DEG C for one hour; (4) ball milling: carrying out ball milling on wet slurry, water and ball in a weight ratio of 1:1.2:2.5 until granularity reaches 1.0mu; (5) shaping; (6) sintering: using electricity to sinter at the temperature of 122010 DEG C for 2 hours, and then automatically cooling; (7) grinding. The invention has the advantages of advanced technical technology, high magnetic performance parameter, big radian of use surface used in a motor, big area, big use magnetic flow and the like.
Description
Technical field
The present invention relates to the permanent-magnet ferrite field, mainly is a kind of high-performance permanent magnet ferrite arch magnet and sintering method.
Background technology
This product is mainly used in the braking automobile motor and makes permanent-magnet stator, for the development of China's automobile and capture international automobile industry main effect is all arranged.Originally all from import, its radian and magnetic property all are not more than this product to the braking automobile motor with magnet.
This project technical solution difficult problem:
1, studies the rule of new interpolation ion, and select suitable interpolation ion, increase La, the replacement amount of Co ion in material, improve magnetic property as additive.
Experiment showed, that present La, Co optimum addition in the Sr ferrite is 0.3 mol ratio, because the technological factor influence, adding most addition also will reduce a lot, be that along with the increasing of solid solution capacity, magnetic property is significantly improved because of the problem of La, the solid solution capacity of Co ion in material.
The ionic radius of rare earth element reduces along with the increase of atomicity, therefore the replacement amount in M type strontium ferrite descends thereupon, the pass of maximum replacement amount and ionic radius is: when atomic number changes from small to big, then ionic radius from large to small, the replacement amount in strontium ferrite is from large to small so.So ionic radius is big more, it is big more to replace.We should select the ion substitution of atomic number less than La.These ions through helping improving the selection of magnetic observation, are found out common useful ion again, test as additive.
In addition, different ions is made up mutually is different to the substitutional ion amount.For example: the maximum replacement amount (at BaFe) 0.5 of Ca, but if with Ca, La the combination, its maximum replacement amount can reach 0.94 we adopt the big ion of ionic radius, add by two kinds of different ion populations, increased the solid solution capacity of La, Co ion, made Br, Hcj, especially Hcj obtains bigger raising.
2, the relation of research crystal grain state of pre-imitation frosted glass and magnetic property and how to change technology and reach the requirement of crystal grain state.
The pre-imitation frosted glass of conventional preparation high-performance requires fully to generate permanent-magnet ferrite M phase in oxidizing atmosphere, and the crystalline particle of material should have tangible crystal grain, and size reaches 0.5 ~ 1mm, better magnetic properties could occur.
3, research preparation hexaplanar shape and the reasonably molding mass of size, and make material equipment, material preparing technology, help the realization of magnetic property index.
Summary of the invention
The present invention mainly is that to solve existing braking automobile motor magnet work area big and improve the total magnetic flux of working face, and provide a kind of high-performance permanent magnet ferrite arch magnet and sintering method, improve the power of motor, solve the technical parameter requirement in big radian magnetic shoe manufacturing process flow and the concerned process steps, solved the technical indicator that permanent-magnet ferrite magnetic property index is reached advanced world standards.
The present invention solves the technical scheme that its technical problem adopts: this high-performance permanent magnet ferrite arch magnet, mainly comprise magnet, and described magnet shape is domes, wherein the inner arc central angle is 158 °.
The sintering method of this high-performance permanent magnet ferrite arch magnet of the present invention, step is as follows:
(1), batching: raw material is prepared Fe by following weight ratio
2O
3: 85 parts; SrCO
3: 15 parts; La
2O
3: 0.5～1.5 part; Co
2O
3: 0.5～1.5 part; SiO
2: 0.5～1.0 part; CaCO
3: 0.5～1.0 part;
(2), mix: the machine that mixes by force mixed 20 minutes;
(3), pre-burning: coal pit 1200-1240 ℃ is incubated 1 hour, natural cooling;
(4), ball milling: wet method material: water: the weight ratio of ball is 1: 1.2: 2.5, and the arrival granularity is 1.0u;
(5), moulding: mould molding reaches green density 3.2 ± 0.2g/cm
3
(6), sintering: electric tunnel cave advances 2 hours sintering of 1220 ± 10 ℃ of insulations of base automatically, cools off automatically with kiln;
(7), mill processing: grinding reaches the drawing dimensional requirement.
As preferably, adopt coarse crushing, in broken, three kinds of equipment of attritioning come brokenly, control the particle diameter of three road equipment fragmentations, control the shape of particle of per pass operation fragmentation simultaneously, the i.e. first road fragmentation is a cubic packing shape, and second road is broken into planar shaped, and three-crushing becomes uniform hexagonal crystalline substance.
As preferably, adopt atomic number less than La
+ 3And Co
+ 3Ion, increase La, the replacement amount of Co ion in ferrite.
As preferably, select granularity 0.7 ~ 0.9um for use, the iron oxide red (Fe of particle size distribution standard deviation δ=0.14 ~ 0.16um
2O
3) add 0.1 ~ 0.5% SiO during batch mixing as the degree of crystallinity controlling agent
2, 0.5 ~ 0.2% H
3BO
3, pre-burning under 1050 ~ 1250 ℃ of temperature.Control warm area length and being subjected to the temperature time, through solid phase reaction, promptly generating particle diameter is 0.7 ~ 1.2um, particle size distribution standard deviation δ=0.14 ~ 0.16um.
The invention has the advantages that: the present invention has the technology advanced person, and the magnetic parameter height uses the face radian big in motor, and area is big, uses characteristics such as magnetic flux is big, for the braking automobile motor provides good excitation field.
Description of drawings:
Fig. 1 is a main TV structure schematic diagram of the present invention;
Description of reference numerals: magnet 1, inner arc central angle 2.
Embodiment
Below in conjunction with embodiment the present invention is further described, but should understand these embodiment limits the scope of the invention, under the situation of the spirit and scope of the present invention, those skilled in the art can make changes and improvements so that it is fit to different operating positions, condition and embodiment to the present invention.
This high-performance permanent magnet ferrite arch magnet mainly comprises magnet, and described magnet shape is domes, and wherein the inner arc central angle is 158 °.The magnet performance parameter index is:
Remanent magnetism Br:420 ± 10mT;
Magnetic strength coercivity H b:310 ± 16kA/m;
HCJ Hcj:430 ± 16kA/m;
Maximum magnetic energy product (BH) max:33 ± 1.5kJ/m
3
The sintering method of this high-performance permanent magnet ferrite arch magnet of the present invention, technological process is: batching-mixing-pre-burning-ball milling-moulding-sintering-mill processing-inspection divides test-warehouse-in, and concrete steps are as follows:
Adopt purity greater than 98% Fe
2O
3The SrCO of powder and 97% above purity
3Powder is 100kg by the weight that feeds intake, and takes by weighing Fe by 85% part by weight
2O
3With take by weighing SrCO in 15% ratio
3Powder, all the other additives are that the requirement of 1000kg takes by weighing respectively by total inventory, and they are La
2O
3: 1.0%; Co
2O
3: 1.0%; SiO
2: 0.8%; CaCO
3: 1.0%.
Adopt the strong machine that mixes to mix 20 minutes, make cellular cake, 1240 ℃ of pre-burnings in 30 meter four hole coal pit, be incubated 1 hour, behind the natural cooling, after the disintegrating machine coarse crushing, press material again in ball mill: water: ball=ball milling to granularity was the 1.0u discharging in 1: 1.2: 2.5, through automatic moulding machine, being molded into density in particular manufacturing craft is 3.2g/cm
3The green compact product that meets geomery, through 2 hours sintering of 1210 ℃ of insulations of the two push pedal electrical kilns of 30m, with the kiln cooling, product is ground to product with fully automatic grinder and uses the drawing requirement again.
Magnetic parameter shown in the subordinate list 1 reaches the requirement of braking automobile motor to magnet.
The intrinsic permanent-magnet ferrite material assay of the high remanent magnetism of Y4254
Among the present invention, adopt the crushing process technology of the different grain shapes of preparation, reach good uniformity, the hexaplanar particle of high conformity has improved the magnetic property index.In order to improve the rate that exists of single domain particle, if grind magnetic thin as far as possible, find in the reality that the meticulous magnetic property of granularity descends on the contrary during the fine grinding of this project, its reason is when some particles are arranged less than 0.1um, the phase decomposition of part ferrite becomes Fe
3O
4And SrCO
3Deng, long in addition grinding can make the Fe of steel ball enter influences magnetic property in the ferrite powder.Adopt coarse crushing, in broken, three kinds of equipment of attritioning come broken, control the particle diameter of three road equipment fragmentations, control the shape of particle of per pass operation fragmentation simultaneously, the i.e. first road fragmentation is a cubic packing shape, second road is broken into planar shaped, three-crushing becomes uniform hexagonal crystalline form, generates uniform particle as far as possible, reaches high performance demands.
Among the present invention, adopt atomic number less than La
+ 3And Co
+ 3Ion, as: Rb (rubidium), Nb (niobium) etc. are as additive, increase La, the replacement amount of Co ion in ferrite, have improved magnetic property.
Among the present invention, select the pre-imitation frosted glass and the manufacture craft thereof of submicron order crystal grain, realize high-orientation, high density, high performance index.Select granularity 0.7 ~ 0.9um for use, the iron oxide red (Fe of particle size distribution standard deviation δ=0.14 ~ 0.16um
2O
3) add 0.1 ~ 0.5% SiO during batch mixing as the degree of crystallinity controlling agent
2, 0.5 ~ 0.2% H
3BO
3, pre-burning under 1050 ~ 1250 ℃ of temperature.Control warm area length and being subjected to the temperature time, through solid phase reaction, promptly generating particle diameter is 0.7 ~ 1.2um, particle size distribution standard deviation δ=0.14 ~ 0.16um.Utilize this pre-imitation frosted glass can produce Br＞0.42 (4200Gs), the knot of Hcj＞414KA/m (5200Oe) burns ferrite.
Its main representative art index in the trial-manufacturing process:
In addition to the implementation, the present invention can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of requirement of the present invention.
Claims (1)
1. high-performance permanent magnet ferrite arch magnet sintering method, it is characterized in that: step is as follows:
(1), batching: raw material is prepared Fe by following weight ratio
2O
3: 85 parts; SrCO
3: 15 parts; La
2O
3: 0.5～1.5 part; Co
2O
3: 0.5～1.5 part; SiO
2: 0.5～1.0 part; CaCO
3: 0.5～1.0 part;
(2), mix: the machine that mixes by force mixed 20 minutes;
(3), pre-burning: coal pit 1200-1240 ℃ is incubated 1 hour, natural cooling;
(4), ball milling: wet method, the material: water: the weight ratio of ball is 1: 1.2: 2.5, and reaching granularity is 1.0 μ;
(5), moulding: mould molding reaches green density 3.2 ± 0.2g/cm
3
(6), sintering: electric tunnel cave advances 2 hours sintering of 1220 ± 10 ℃ of insulations of base automatically, cools off automatically with kiln;
(7), mill processing: grinding reaches the drawing dimensional requirement.
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|---|---|---|---|
| CN2009100986039A CN101615470B (en) | 2009-05-18 | 2009-05-18 | High-performance permanent magnet ferrite arch magnet and sintering method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100986039A CN101615470B (en) | 2009-05-18 | 2009-05-18 | High-performance permanent magnet ferrite arch magnet and sintering method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101615470A CN101615470A (en) | 2009-12-30 |
| CN101615470B true CN101615470B (en) | 2011-10-26 |
Family
ID=41495058
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| CN102738974B (en) * | 2012-07-06 | 2013-11-06 | 浙江凯文磁钢有限公司 | Method for increasing compressive strength of tile-shaped magnet for permanent magnet motor |
| CN103771882B (en) * | 2013-12-31 | 2015-11-25 | 重庆凌达磁材科技有限公司 | Permanent-magnet ferrite and manufacture method thereof and ultra-thin permanent ferrite magnetic tile |
| CN105161244B (en) * | 2015-10-21 | 2017-09-05 | 李延军 | A kind of modified magnet and its application on automotive axle |
| JP2018050045A (en) * | 2016-09-16 | 2018-03-29 | Tdk株式会社 | Sintered magnet |
| CN107481828A (en) * | 2017-07-28 | 2017-12-15 | 江门旭弘磁材有限公司 | A kind of production method of high-coercive force high energy product Ferrite Material |
| CN107579628A (en) * | 2017-08-30 | 2018-01-12 | 浙江凯文磁钢有限公司 | A kind of method for manufacturing radial radiation orientation rare-earth permanent magnet ferrite arch magnet |
| CN108987021A (en) * | 2018-06-21 | 2018-12-11 | 浙江凯文磁钢有限公司 | A kind of permanent-magnet ferrite material and its manufacturing method containing Bi, Ni element |
| CN112321294A (en) * | 2020-11-04 | 2021-02-05 | 重庆凌达磁材科技有限公司 | Ferrite permanent magnetic material and preparation method thereof |
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Denomination of invention: High performance permanent magnet ferrite arch magnet and sintering method Effective date of registration: 20231117 Granted publication date: 20111026 Pledgee: Dongyang Branch of China Construction Bank Co.,Ltd. Pledgor: ZHEJIANG KAIVEN MAGNET Co.,Ltd. Registration number: Y2023980066076 |
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